<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>课程管理页面</title>
    <style>
        div{
            width: 400px;
            height: 400px;
            background-color: #00a65a;
            font-family: "SimSun", "Helvetica Neue", Helvetica, Arial;
            font-size: 50px;
        }
    </style>
</head>
<body>
<div>
    彦民绿
</div>
</body>
</html>